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Electromagnetic Engineering: Electrostatics
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Electromagnetic Engineering: Electrostatics
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25 Questions

1. Find the force between two charges when they are brought in contact and separated by 4cm apart, charges are 2nC and -1nC, in μN.
2. If the sheet of a bakelite is inserted between the plates of an air capacitor, the capacitance will
3. A dielectric material must be
4. A charge of 2 X 10-7 C is acted upon by a force of 0.1N. Determine the distance to the other charge of 4.5 X 10-7 C, both the charges are in vacuum.
5. Which of the following materials has the highest value of dielectric constant?
6. For a test charge placed at infinity, the electric field will be
7. A field line and an equipotential surface are
8. Find the potential due to a charged ring of density 2 units with radius 2m and the point at which potential is measured is at a distance of 1m from the ring.
9. Find the force of interaction between 60 stat coulomb and 37.5 stat coulomb spaced 7.5cm apart in transformer oil(εr=2.2) in 10-4 N,
10. If three 10 uF capacitors are connected in parallel, the net cararitance is
11. Electric field intensity due to infinite sheet of charge σ is
12. A circular disc of radius 5m with a surface charge density ρs = 10sinφ is enclosed by surface. What is the net flux crossing the surface?
13. 'The total electric flux through any closed surface surrounding charges is equal to the amount oflcharge enclosed
14. The scalar factor of spherical coordinates is
15. The electric field intensity at a point situated 4 metres from a point charge is 200 N/C. If the distance is reduced to 2 metres, the field intensity will be
16. The sparking between two electrical contacts can be reduced by inserting a
17. Find the potential of V = 60sin θ/r2 at P(3,60,25)
18. Transform the vector (4,-2,-4) at (1,2,3) into spherical coordinates.
19. The Gaussian surface for a line charge will be
20. Conduction in metals is due to
21. Voltage applied across a ceramic dielectric produces an electrolytic field 100 times greater than air. What will be the value of dielectric constant ?
22. Six equal point charges Q = 10nC are located at 2,3,4,5,6,7m. Find the potential at origin.
23. For which of the following parameter variation, the capacitance of the capacitor remains unaffected ?
24. Coulomb law is employed in
25. Divergence theorem is based on

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